Boil fresh, raw milk in a saucepan for a few seconds (180°F). Cool until warm (100°F). Stir in powdered milk. Thoroughly mix yogurt with a little warm milk, then add to the rest of the warm milk and stir well. Pour mixture into jars or glasses and let stand neck-deep in yogurt maker at 110-120°F until set (about 3 hours). Chill immediately after yogurt sets. Keeps in refrigerator approximately 1 week.